Add support for uopz extension handling

Introduces handling for the uopz extension to ensure the application does not break due to disabled exit calls by uopz. This change checks for the presence of the uopz extension and its settings, attempting to enable exit calls where possible to maintain application stability.

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 
 ## Unreleased
+### Added
+- Support for handling the `uopz` extension to prevent the application from breaking due to disabled `exit` calls by `uopz`.
 
 ## 1.2.22
 ### Fixes

mailscanner/functions.php

@@ -33,6 +33,15 @@
     error_reporting(E_ALL ^ E_DEPRECATED ^ E_STRICT);
 }
 
+if (extension_loaded('uopz') && !(ini_get('uopz.disable') || ini_get('uopz.exit'))) {
+    // uopz works at opcode level and disables exit calls
+    if (function_exists('uopz_allow_exit')) {
+        @uopz_allow_exit(true);
+    } else {
+        throw new \RuntimeException('The uopz extension ignores exit calls and breaks this application. Disable the extension or set "uopz.exit" to TRUE');
+    }
+}
+
 // Read in MailWatch configuration file
 if (!is_readable(__DIR__ . '/conf.php')) {
     exit(__('cannot_read_conf'));